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authorchriseth <chris@ethereum.org>2018-09-17 21:13:52 +0800
committerGitHub <noreply@github.com>2018-09-17 21:13:52 +0800
commitd46d3feb415d88f49cf1a6ec4f6ba0c52b1b5428 (patch)
treeb571e164bed958810e0dd4d79790b406b4c834bf
parentf4ed315197c94580daa4e28dab16cb4a6c6dc11a (diff)
parentf3cbdadec7a38626e5dd64c0faa981161b99bd80 (diff)
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Merge pull request #4904 from liangdzou/type_conversion
type conversion checker for array should be stronger
-rw-r--r--libsolidity/analysis/TypeChecker.cpp19
-rw-r--r--test/libsolidity/syntaxTests/conversion/allowed_conversion_to_bytes_array.sol9
-rw-r--r--test/libsolidity/syntaxTests/conversion/allowed_conversion_to_string.sol9
-rw-r--r--test/libsolidity/syntaxTests/conversion/explicit_conversion_from_storage_array_ref.sol10
-rw-r--r--test/libsolidity/syntaxTests/conversion/implicit_conversion_from_storage_array_ref.sol7
-rw-r--r--test/libsolidity/syntaxTests/conversion/not_allowed_conversion_to_int_array_pointer1.sol10
-rw-r--r--test/libsolidity/syntaxTests/conversion/not_allowed_conversion_to_int_array_pointer2.sol10
-rw-r--r--test/libsolidity/syntaxTests/dataLocations/memory_storage_data_location.sol12
8 files changed, 84 insertions, 2 deletions
diff --git a/libsolidity/analysis/TypeChecker.cpp b/libsolidity/analysis/TypeChecker.cpp
index 13294476..3056561b 100644
--- a/libsolidity/analysis/TypeChecker.cpp
+++ b/libsolidity/analysis/TypeChecker.cpp
@@ -1733,8 +1733,23 @@ bool TypeChecker::visit(FunctionCall const& _functionCall)
DataLocation dataLoc = DataLocation::Memory;
if (auto argRefType = dynamic_cast<ReferenceType const*>(argType.get()))
dataLoc = argRefType->location();
- resultType = ReferenceType::copyForLocationIfReference(dataLoc, resultType);
- if (!argType->isExplicitlyConvertibleTo(*resultType))
+ if (auto type = dynamic_cast<ReferenceType const*>(resultType.get()))
+ resultType = type->copyForLocation(dataLoc, type->isPointer());
+ if (argType->isExplicitlyConvertibleTo(*resultType))
+ {
+ if (auto argArrayType = dynamic_cast<ArrayType const*>(argType.get()))
+ {
+ auto resultArrayType = dynamic_cast<ArrayType const*>(resultType.get());
+ solAssert(!!resultArrayType, "");
+ solAssert(
+ argArrayType->location() != DataLocation::Storage ||
+ ((resultArrayType->isPointer() || (argArrayType->isByteArray() && resultArrayType->isByteArray())) &&
+ resultArrayType->location() == DataLocation::Storage),
+ "Invalid explicit conversion to storage type."
+ );
+ }
+ }
+ else
{
if (resultType->category() == Type::Category::Contract && argType->category() == Type::Category::Address)
{
diff --git a/test/libsolidity/syntaxTests/conversion/allowed_conversion_to_bytes_array.sol b/test/libsolidity/syntaxTests/conversion/allowed_conversion_to_bytes_array.sol
new file mode 100644
index 00000000..78c40e53
--- /dev/null
+++ b/test/libsolidity/syntaxTests/conversion/allowed_conversion_to_bytes_array.sol
@@ -0,0 +1,9 @@
+contract C {
+ bytes a;
+ bytes b;
+ function f() public view {
+ bytes storage c = a;
+ bytes memory d = b;
+ d = bytes(c);
+ }
+}
diff --git a/test/libsolidity/syntaxTests/conversion/allowed_conversion_to_string.sol b/test/libsolidity/syntaxTests/conversion/allowed_conversion_to_string.sol
new file mode 100644
index 00000000..f7e96f35
--- /dev/null
+++ b/test/libsolidity/syntaxTests/conversion/allowed_conversion_to_string.sol
@@ -0,0 +1,9 @@
+contract C {
+ string a;
+ string b;
+ function f() public view {
+ string storage c = a;
+ string memory d = b;
+ d = string(c);
+ }
+}
diff --git a/test/libsolidity/syntaxTests/conversion/explicit_conversion_from_storage_array_ref.sol b/test/libsolidity/syntaxTests/conversion/explicit_conversion_from_storage_array_ref.sol
new file mode 100644
index 00000000..458adda6
--- /dev/null
+++ b/test/libsolidity/syntaxTests/conversion/explicit_conversion_from_storage_array_ref.sol
@@ -0,0 +1,10 @@
+contract C {
+ int[10] x;
+ function f() public view {
+ int[](x);
+ int(x);
+ }
+}
+// ----
+// TypeError: (55-63): Explicit type conversion not allowed from "int256[10] storage ref" to "int256[] storage pointer".
+// TypeError: (67-73): Explicit type conversion not allowed from "int256[10] storage ref" to "int256".
diff --git a/test/libsolidity/syntaxTests/conversion/implicit_conversion_from_storage_array_ref.sol b/test/libsolidity/syntaxTests/conversion/implicit_conversion_from_storage_array_ref.sol
new file mode 100644
index 00000000..31e298d0
--- /dev/null
+++ b/test/libsolidity/syntaxTests/conversion/implicit_conversion_from_storage_array_ref.sol
@@ -0,0 +1,7 @@
+contract C {
+ int[10] x;
+ int[] y;
+ function f() public {
+ y = x;
+ }
+}
diff --git a/test/libsolidity/syntaxTests/conversion/not_allowed_conversion_to_int_array_pointer1.sol b/test/libsolidity/syntaxTests/conversion/not_allowed_conversion_to_int_array_pointer1.sol
new file mode 100644
index 00000000..3aa59612
--- /dev/null
+++ b/test/libsolidity/syntaxTests/conversion/not_allowed_conversion_to_int_array_pointer1.sol
@@ -0,0 +1,10 @@
+contract C {
+ uint[] a;
+ uint[] b;
+ function f() public view {
+ uint[] storage c = a;
+ uint[] storage d = b;
+ d = uint[](c);
+ }
+}
+// ----
diff --git a/test/libsolidity/syntaxTests/conversion/not_allowed_conversion_to_int_array_pointer2.sol b/test/libsolidity/syntaxTests/conversion/not_allowed_conversion_to_int_array_pointer2.sol
new file mode 100644
index 00000000..060c9707
--- /dev/null
+++ b/test/libsolidity/syntaxTests/conversion/not_allowed_conversion_to_int_array_pointer2.sol
@@ -0,0 +1,10 @@
+contract C {
+ uint[] a;
+ uint[] b;
+ function f() public view {
+ uint[] storage c = a;
+ uint[] memory d = b;
+ d = uint[](c);
+ }
+}
+// ----
diff --git a/test/libsolidity/syntaxTests/dataLocations/memory_storage_data_location.sol b/test/libsolidity/syntaxTests/dataLocations/memory_storage_data_location.sol
new file mode 100644
index 00000000..a441b540
--- /dev/null
+++ b/test/libsolidity/syntaxTests/dataLocations/memory_storage_data_location.sol
@@ -0,0 +1,12 @@
+contract C {
+ int[] x;
+ function f() public {
+ int[] storage a = x;
+ int[] memory b;
+ a = b;
+ a = int[](b);
+ }
+}
+// ----
+// TypeError: (93-94): Type int256[] memory is not implicitly convertible to expected type int256[] storage pointer.
+// TypeError: (102-110): Type int256[] memory is not implicitly convertible to expected type int256[] storage pointer.